EP4033078A1 - Moteur à combustion interne pourvu de capteur de nh3 dans la ligne de gaz d'échappement - Google Patents

Moteur à combustion interne pourvu de capteur de nh3 dans la ligne de gaz d'échappement Download PDF

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Publication number
EP4033078A1
EP4033078A1 EP22150769.2A EP22150769A EP4033078A1 EP 4033078 A1 EP4033078 A1 EP 4033078A1 EP 22150769 A EP22150769 A EP 22150769A EP 4033078 A1 EP4033078 A1 EP 4033078A1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
catalytic converter
way catalytic
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22150769.2A
Other languages
German (de)
English (en)
Inventor
Stefan Paukner
Ekkehard Pott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP4033078A1 publication Critical patent/EP4033078A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/101—Three-way catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F01N2570/145—Dinitrogen oxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/18—Ammonia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1402—Exhaust gas composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1616—NH3-slip from catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters

Definitions

  • the invention relates to an internal combustion engine and a method for operating such an internal combustion engine.
  • the control of the mass ratio of the air and fuel components of a mixture that is fed to the internal combustion engine of an internal combustion engine for combustion is not only of central importance for the operation of the internal combustion engine but also for after-treatment of exhaust gas generated by the internal combustion engine.
  • This mass ratio is usually described with the dimensionless characteristic number ⁇ (lambda), which is also referred to as the combustion air ratio.
  • the combustion air ratio specifically indicates the mass ratio of the mixture components air and fuel relative to the stoichiometrically ideal mass ratio for a theoretically complete combustion process.
  • Gasoline engines that are spark-ignited and quantity-controlled are often operated with a fundamentally stoichiometric air-combustion ratio, i.e. with ⁇ ⁇ 1.
  • a fundamentally stoichiometric air-combustion ratio i.e. with ⁇ ⁇ 1.
  • the residual oxygen content in the exhaust gas is analyzed using a so-called lambda probe and the air-fuel mass ratio is controlled for subsequent combustion processes is used.
  • Such a reactive control means that the actual combustion air ratio fluctuates in a usually relatively narrow range around the stoichiometric combustion air ratio.
  • it is known to actively implement a so-called natural frequency control for the combustion air ratio in which the combustion engine is defined alternately slightly rich, i.e.
  • a typical configuration of an exhaust gas aftertreatment device integrated into the exhaust line of a spark-ignition engine comprises, viewed in the flow direction of the exhaust gas, first a first lambda probe, then a first three-way catalytic converter, then a second lambda probe and finally a second three-way catalytic converter.
  • a Three-way catalytic converter is characterized in that it converts carbon monoxide (CO), nitrogen oxides (NOx) and unburned hydrocarbons (HC) into carbon dioxide (CO 2 ), nitrogen (N 2 ) and water (H 2 O).
  • CO 2 carbon dioxide
  • NOx nitrogen oxides
  • HC unburned hydrocarbons
  • CO 2 carbon dioxide
  • N 2 nitrogen
  • H 2 O water
  • such a three-way catalytic converter usually also has what is known as an oxygen storage capacity. As a result, it can store oxygen to a limited extent.
  • the U.S. 7,003,943 B2 discloses a method for the controlled adjustment of the air/fuel ratio ⁇ in an internal combustion engine by means of an NOx sensor, which is intended to replace the two lambda sensors that are otherwise customary.
  • the U.S. 10,598,063 B2 discloses a method for functional testing of a three-way catalytic converter using a NOx sensor which is arranged downstream of the three-way catalytic converter.
  • the U.S. 9,115,660 B2 discloses an internal combustion engine with an internal combustion engine and an exhaust system in which a three-way catalytic converter, an NOx storage catalytic converter, an SCR catalytic converter and an NOx sensor are integrated, viewed in the flow direction of the exhaust gas.
  • the object of the invention was to avoid as far as possible the formation of ammonia and nitrous oxide in the exhaust gas of an internal combustion engine.
  • an internal combustion engine according to claim 1 which can be operated according to a method which is the subject of claim 7.
  • Advantageous embodiments of the internal combustion engine according to the invention and preferred embodiments of the method according to the invention are the subject of the further patent claims and/or result from the following description of the invention.
  • an internal combustion engine which comprises at least one internal combustion engine and an exhaust system.
  • the internal combustion engine is preferably spark-ignited at least at times and can also preferably be operated in a quantity-regulated manner (ie then as an Otto engine).
  • a (first) lambda probe, then a first three-way catalytic converter and then a second three-way catalytic converter are integrated into the exhaust line, viewed in the flow direction of the exhaust gas, ie starting from the internal combustion engine.
  • an NH 3 sensor ie a sensor by means of which ammonia can be determined directly or indirectly, is also integrated in the exhaust line between the first three-way catalytic converter and the second three-way catalytic converter.
  • Switching from lean operation to rich operation can preferably take place within the scope of a method according to the invention when a defined Presence (ie a fundamentally determinable presence or presence in a defined minimum amount) of oxygen in the exhaust gas downstream of the first three-way catalyst (and preferably upstream of the second three-way catalyst) is determined.
  • the presence of oxygen in the exhaust gas can be determined in a basically known manner by means of a second lambda probe, which is integrated in the exhaust line between the first three-way catalytic converter and the second three-way catalytic converter.
  • an NOx sensor ie a sensor by means of which at least nitrogen oxides can also be determined directly or indirectly, can also be arranged in this section of the exhaust line for this purpose.
  • Such a NOx sensor can also advantageously be designed integrally with the NH 3 sensor, ie as an NH 3 -NOx combination sensor.
  • At least one particle filter can also be integrated into the exhaust line in order to minimize emission of particles with the exhaust gas.
  • a particle filter can be assigned to the first three-way catalytic converter and/or the second three-way catalytic converter, with integration into the respective three-way catalytic converter (to form a so-called four-way catalytic converter) or the arrangement downstream, in particular immediately downstream of it (and with regard to the first three-way catalytic converter upstream of the second three-way catalyst) is understood.
  • a particle filter is provided with a coating that acts as a three-way catalytic converter.
  • the first lambda probe is designed as a broadband lambda probe, whereby high control accuracy for the basic control of the air/fuel ratio can be achieved by means of the first lambda probe.
  • the second lambda probe that may be present can advantageously be configured as a jump lambda probe (also known as a two-point lambda probe), as a result of which the incipient presence of oxygen in the exhaust gas can be determined relatively quickly and accurately.
  • the first lambda probe can also be configured as a jump lambda probe.
  • the internal combustion engine of an internal combustion engine according to the invention can preferably be operated with liquid fuel (ie in particular gasoline). Operation with a gaseous fuel (in particular natural gas, LNG or LPG) is also possible.
  • liquid fuel ie in particular gasoline
  • gaseous fuel in particular natural gas, LNG or LPG
  • the invention also relates to a motor vehicle, in particular a wheel-based and non-rail-bound motor vehicle (preferably a car or a truck), with an internal combustion engine according to the invention.
  • a motor vehicle in particular a wheel-based and non-rail-bound motor vehicle (preferably a car or a truck), with an internal combustion engine according to the invention.
  • the internal combustion engine of the internal combustion engine can be provided in particular for the (direct or indirect) provision of the driving power for the motor vehicle.
  • the 1 shows an internal combustion engine for a motor vehicle according to the invention and thus also suitable for carrying out a method according to the invention.
  • This comprises an internal combustion engine 1, which is designed, for example, in the form of a reciprocating piston engine with four cylinder openings 2 arranged in a row.
  • the cylinder openings 2 delimit a combustion chamber 4 with reciprocating pistons 3 guided therein and a cylinder head.
  • these combustion chambers 4 are supplied with fresh gas via a fresh gas line 5, with the fresh gas being supplied by means of inlet valves 9, which are connected to the individual combustion chambers 4 are assigned is controlled.
  • the fresh gas is exclusively or mainly air that is sucked in from the environment.
  • Exhaust gas that is produced during the combustion of mixture quantities which consists of the fresh gas and fuel injected directly into the combustion chambers 4 via fuel injectors 6, is discharged via an exhaust line 7 of the internal combustion engine, with the exhaust gas being discharged by means of outlet valves 10, which control the individual Combustion chambers 4 are assigned, is controlled.
  • the quantities of mixture in the combustion chambers are ignited by means of electrical ignition devices 16 which, for example, generate ignition sparks (spark plugs).
  • the exhaust gas flows through an exhaust gas after-treatment device 8, which is intended to remove components of the exhaust gas that are regarded as pollutants from the exhaust gas or to convert them into harmless components.
  • the internal combustion engine can be supercharged, in which case a fresh-gas compressor (not shown) would then be integrated into the fresh-gas line 5 .
  • this exhaust-gas turbocharger would also include an exhaust-gas turbine (not shown), which is integrated into the exhaust line. Exhaust gas that flows through the exhaust gas turbine then leads to a rotating drive of a turbine impeller, which is rotationally drivingly connected to a compressor impeller of the fresh gas compressor, so that as a result the fresh gas compressor is driven by the exhaust gas turbine.
  • the exhaust gas aftertreatment device 8 of the internal combustion engine comprises, seen in the direction of flow of the exhaust gas, a first lambda probe 11, preferably configured as a broadband lambda probe, then a first three-way catalytic converter 12, which can optionally be configured as a four-way catalytic converter and can therefore also include a particle filter, then an NOx sensor 13 and an NH 3 sensor 14, which is designed in the form of an NH 3 -NO x combination sensor, and finally a second three-way catalytic converter 15, which can also optionally be designed as a four-way catalytic converter.
  • the fresh gas to be supplied to the internal combustion engine 1 and the quantities of fuel to be introduced into the individual combustion chambers 4 by means of the fuel injectors 6 per working cycle are specifically set.
  • the operating position of a throttle valve (not shown) integrated in the fresh-gas line 5 and/or a variable valve drive (not shown), by means of which the inlet valves 9 can be variably actuated can be changed with regard to the fresh gas.
  • the internal combustion engine is at least temporarily operated stoichiometrically ( ⁇ 1) on average, so that the oxygen supplied to the combustion chambers 4 essentially corresponds exactly to the quantity over this period of time that is currently required for thermal conversion of the fuel supplied at the same time. Since constant stoichiometric operation of the internal combustion engine cannot be implemented in terms of control technology, internal combustion engine 1 is alternately operated slightly rich and slightly lean in such a way that stoichiometric operation is set on average over the period under consideration.
  • a changeover from rich operation to lean operation of the internal combustion engine 1 takes place when a defined presence of ammonia in the exhaust gas is determined by means of the NH 3 sensor 14 .
  • Such a presence of ammonia in the exhaust gas is due to the fact that rich breakthroughs occur in the first three-way catalyst 12 because unburned hydrocarbons that are contained in the raw exhaust gas during rich operation are no longer largely fully utilized in the first three-way catalyst 12 stored oxygen can be converted.
  • the direct determination of ammonia by means of the NH 3 sensor 14 and the use of such a determination for defining the point in time for switching from rich operation to lean operation of the internal combustion engine 1 means that rich breakthroughs occur as quickly as possible during operation of the internal combustion engine 1 are detected and this is counteracted by switching to a lean operation of the internal combustion engine 1, since the presence of unburned hydrocarbons in the raw exhaust gas is largely avoided in the lean operation. Furthermore, in a lean operation of the internal combustion engine 1 , oxygen contained in the raw exhaust gas is stored in an oxygen storage capacity of the first three-way catalyst 12 . As a result, oxygen is again available in first three-way catalytic converter 12 for conversion of unburned hydrocarbons during subsequent rich operation of internal combustion engine 1 .
  • Such a switchover from lean operation to rich operation takes place when a defined presence of oxygen in the exhaust gas downstream of the first three-way catalytic converter 12 is determined by means of the NOx sensor 13, this presence of oxygen in the exhaust gas being due to the fact that the oxygen storage capacity of the first three-way catalytic converter 12 is essentially completely filled.
  • the formation of ammonia and, via the ammonia, of nitrous oxide in the first three-way catalytic converter 12 can be minimized in a relatively simple manner by regulating the combustion air ratio during operation of the internal combustion engine 1 according to the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP22150769.2A 2021-01-21 2022-01-10 Moteur à combustion interne pourvu de capteur de nh3 dans la ligne de gaz d'échappement Pending EP4033078A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021101244.9A DE102021101244A1 (de) 2021-01-21 2021-01-21 Brennkraftmaschine mit NH3-Sensor im Abgasstrang

Publications (1)

Publication Number Publication Date
EP4033078A1 true EP4033078A1 (fr) 2022-07-27

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Application Number Title Priority Date Filing Date
EP22150769.2A Pending EP4033078A1 (fr) 2021-01-21 2022-01-10 Moteur à combustion interne pourvu de capteur de nh3 dans la ligne de gaz d'échappement

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EP (1) EP4033078A1 (fr)
DE (1) DE102021101244A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7003943B2 (en) 2003-05-05 2006-02-28 Siemens Aktiengellschaft Method and device for lambda control and for catalytic converter diagnosis in an internal combustion engine
DE102013211521A1 (de) * 2012-06-26 2014-01-02 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Technik zur Diagnose und Steuerung einer Ammoniakerzeugung von einem TWC für einen passiven Ammoniak-SCR-Betrieb
EP2853725A2 (fr) * 2013-09-26 2015-04-01 General Electric Company Systèmes et procédés pour surveiller la désactivation d'un catalyseur et commander un rapport air/carburant
US9115660B2 (en) 2009-10-06 2015-08-25 Toyota Jidosha Kabushiki Kaisha Exhaust purifying system for internal combustion engine
US20190101033A1 (en) * 2017-03-31 2019-04-04 Toyota Jidosha Kabushiki Kaisha Exhaust purification system of internal combustion engine
DE102018218138A1 (de) * 2018-10-23 2020-04-23 Continental Automotive Gmbh Verfahren zur Abgasnachbehandlung und Abgasnachbehandlungssystem

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8387448B2 (en) 2011-01-19 2013-03-05 GM Global Technology Operations LLC Method for monitoring exhaust gas aftertreatment devices
DE102019100384A1 (de) 2019-01-09 2020-07-09 Volkswagen Aktiengesellschaft Abgasnachbehandlungssystem und Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7003943B2 (en) 2003-05-05 2006-02-28 Siemens Aktiengellschaft Method and device for lambda control and for catalytic converter diagnosis in an internal combustion engine
US9115660B2 (en) 2009-10-06 2015-08-25 Toyota Jidosha Kabushiki Kaisha Exhaust purifying system for internal combustion engine
DE102013211521A1 (de) * 2012-06-26 2014-01-02 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Technik zur Diagnose und Steuerung einer Ammoniakerzeugung von einem TWC für einen passiven Ammoniak-SCR-Betrieb
EP2853725A2 (fr) * 2013-09-26 2015-04-01 General Electric Company Systèmes et procédés pour surveiller la désactivation d'un catalyseur et commander un rapport air/carburant
US20190101033A1 (en) * 2017-03-31 2019-04-04 Toyota Jidosha Kabushiki Kaisha Exhaust purification system of internal combustion engine
US10598063B2 (en) 2017-03-31 2020-03-24 Toyota Jidosha Kabushiki Kaisha Exhaust purification system of internal combustion engine
DE102018218138A1 (de) * 2018-10-23 2020-04-23 Continental Automotive Gmbh Verfahren zur Abgasnachbehandlung und Abgasnachbehandlungssystem

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